compat.sh: enable CBC-SHA-2 suites for GnuTLS
compat.sh: enable CBC-SHA-2 suites for GnuTLS

Recent GnuTLS packages on Ubuntu 16.04 have them disabled.

From /usr/share/doc/libgnutls30/changelog.Debian.gz:

gnutls28 (3.4.10-4ubuntu1.5) xenial-security; urgency=medium

  * SECURITY UPDATE: Lucky-13 issues
    [...]
    - debian/patches/CVE-2018-1084x-4.patch: hmac-sha384 and sha256
      ciphersuites were removed from defaults in lib/gnutls_priority.c,
      tests/priorities.c.

Since we do want to test the ciphersuites, explicitly re-enable them in the
server's priority string. (This is a no-op with versions of GnuTLS where those
are already enabled by default.)

Signed-off-by: Manuel Pégourié-Gonnard <4ba0d615aeeda88e422ca8fba28fe2938485facf@arm.com>

Mbed-TLS/mbedtls,NXPmicro/mbedtls,NXPmicro/mbedtls,ARMmbed/mbedtls,Mbed-TLS/mbedtls,NXPmicro/mbedtls,NXPmicro/mbedtls,ARMmbed/mbedtls,ARMmbed/mbedtls,Mbed-TLS/mbedtls,ARMmbed/mbedtls,Mbed-TLS/mbedtls